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习题练习：Physics Unit17: Electric Potential
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 作者: admin  发布日期: 2022-08-15 14:49    总分: 75分  得分: _____________

答题人: 匿名未登录  开始时间: 22年08月15日 14:49  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which of the following is 5olz 4tv0+m ronot a vector?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One joule per coulomb im6ghl /2lah/l s a

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two identical aluminum objects are insulated from their surrounpswzw32q;scq0t u7y 3dings. Object A has a net charge of excess electrons. Object B izq y2wc73 su0;wsp3t qs grounded. Which object is at a higher potential?

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  For a proton moving in the direction of the electric fiel;nxz,0w/umvx o nt6u6 d

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  For an electron moving in a direction opposite to the electric fie* *dj wp fncbqyvl*7ck)jd* 3/*h o)h;ju,e sgld

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Several electrons are placed on a hollow conducting sphere. Thym4f2kp*tyk5i91m u pey

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A small charged ballylkq 0tu607 jf is accelerated from rest to a speed v by a 500 V potential difference. If the potential difference is changed to 2000 V, what will the new speed of yj070qtfkl 6uthe ball be?

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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A surface on which all points are at the same potential iqn qnax8;us *jrr d7yf :*zp)d9n+ gzj:n 2l7zs referred to as

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A negative charge is moved from point A to point B along an equi :uw042ot/;9*ogim krv nzspjpotential surfaci 0zkvnt;9/w j* 2rsm:p oo4gue.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mustr- m 69hv*)cvrxcyg p0 be

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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The energy acquired by a particle carrying a charge equal to that on the ele6j*bejor+ckfp4nijc:- py2 fz, w)k/ctron as a result of moving thkj wpec:z yifnf-6p,k)or/c *+jj b24rough a potential difference of one volt is referred to as

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The electron-volt is a unit ofb*6us bn4 m)ti

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt corr)mpv v)gh+/ wsesponds to

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potential /yyu4ge6ofn h3*yrh m arv1 :fbt;- 1iat a distance of 2.0 m from a positive point charge is 100 V. What is the absolute potential 4.0 m away from the same point charhy 3oyyia;nt:fr/rbv* e g-64hf 1m1uge?

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potential at a distance of 2.0 mdfbh c9i+yl.u 04d/tbt .j/rn from a negative point charge is -100 V. What is the absolute potential 4.0 m away from the n .dujiy9l cb dht.f0t4r//+b same point charge?

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potential at the exact center of a squarev6z k) y0xt/ q-qqja.h is 3.0 V when a charge of +Q is located at one of the square's corners. Whaq x.-k)0h /zqyjatq v6t is the absolute potential at the square's center when each of the other corners is also filled with a charge of +Q?

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17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potential at the center of a square is 3.0 V when a chanuy3r 0+5hd;xmup; ccrge of +Q is located at one of the square's corners. What is the absolute potential at m0dx5n+uru c3c;; yh pthe square's center when a second
charge of -Q is placed at one of the remaining corners?

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18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electric dipoles always consist of two charges thabln:uzc(74fbpl n s0 6agj/m /t are

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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One coulomb per voltu8h51* uf pjh/ qok9nx is a

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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel-plate capacitors are identical in every respect excek:c/c -s/xve; baisw5pt that one has twice the plate area of the other. Iwb: v/k i a;5s-cxcse/f the smaller capacitor has capacitance C, the larger one has capacitance

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21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor has a capacitance o tcg*x4w/a0*irtze:e f C. If the area of the plates is doubled and the distance betwee/g*it ar :tczex*w4e0n the plates is halved, what is the new capacitance?

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22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A battery charges a paxw jk -pq ,/eg j7-xl2; -/krdm)dywsarallel-plate capacitor fully and then is removed. The plates are immediately pulled apart/ ,) jkw;dx -7pjkxmdae/r -lq-2gsyw. (With the battery disconnected, the amount of charge on the plates remains constant.) What happens to the potential difference between the plates as they are being separated?

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23#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If the electric field between the plates of a given ca7/k 0:5nbftey 6i klavpacitor is weakened, the capacitanc6k:etkbf v 0 /5iya7nle of that capacitor

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24#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The plates of a parallel-plate capacitor are maintained with constant voltv9u nkcnzg0+7k za2 x1age by a battcvk901a2xgzznu nk + 7ery as they are pulled apart. During this process, the amount of charge on the plates must

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25#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The plates of a parallel-plate capacitor are maintain8oyif sf k wf(622ygd(ed with constant voltage by a battery as they are pulled apart. What happens to the strength of the s yw fdgfioy(2k268f(electric field during this process?

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26#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
State three reasons for s+z0+:5 9y: zhci jdejyo)iaj adding a dielectric material between the plates of a capahy ijszc:+io z) da ye+j0j:95citor.
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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material such as paper is placed 9( bt8hg yuqkpl06dw9g uz :7fbetween the plates of a capacitor. What happq9pyk(g: zb6tw u gl079hfu d8ens to the capacitance?

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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material suchotux q9z:;, wy7jltz3 as paper is placed between the plates of a capacitor holding a fixed charge. What happens tzult;:ox9wyjq,7z 3to the electric field between the plates?

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29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor is connected to a battery and becomes fully charged. x/xt s0ifewbd co-34- The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off. The eneri 3wdx-xceb0f t4 /os-gy stored in this capacitor has

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30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Doubling the capacitance of a capacitor hol u6 ynl8qoeq8/ding a constant charge causes the energy stored in olu68yqn q/ e8that capacitor to

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31#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Doubling the voltage across a given capacitos6u9fdkcwo5upu 7 -or1c9s1 x r causes the energy stored in that capa19ou sdr69upo k5-c1uf7xwcs citor to

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32#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  It takes 50 J of energy to move 10 C of charge from point A to point gs0 tsqxcr:eug5lzg7 a 25r2) B. What is the potential difference between points A g )5:ct 2s e2uzg0qr7g 5xsalrand B?

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33#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The net work done in moving an electron from poin tlckzl0;h.; gt A, where the potential is -50 V, to point B, where the potential is +50 V, isz;l.; 0cght lk

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34#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A proton, initially at rest, is accelerated through anwl(0 3 u)1f th2vrn;zoulfx9 x electric potential difference of 500 V. What iw lx2h xu;oz9 t1ufn30v fr(l)s the kinetic energy of the proton?

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35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A proton, initially at rest, is acceleratedjba s2s(+kobm* qz /s:p-bxo;n5d i4)cs p*zg through an electric potential difference of 500 V.* q/zksb:naso-md so ()c+ sp4 p;xgbj2*b 5zi What is the speed of the proton?

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36#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Starting from rest, a proton fallwf*)w 20sww-iukk; a la..dmk s through a potential difference of 1200 V. What speed does it acqufsw m0.)ka lw.w- 2ka;ki *udwire?

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37#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much work does 9..ox/vhp.x1t f0 V do in moving $8.5 \times 10^{18} \; electrons$?

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38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A stationary electron is accelerated through a poten:9m9one*d,exdp l 7cxtial difference of 500 V. What is the velocity of tl9*c9,7od: pxdee nmxhe electron afterward?

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39#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 4.0-g object carriesm+q o+dv .5yao a charge of 20 mC. The object is accelerated from rest through a potential difference, and ad5+q .yo mva+ofterward the ball is moving at 2.0 m/s. What is the magnitude of the potential difference?

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40#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 6.0-V battery maintains the electrical potential difference betnl5 onm*e) cju..+ ae*xwi3pp ween two parallel metal plates separated by 1.0 mm. What is the electric field between lapx**pu +.ewi .emjo3cn)n5 the plates?

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41#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A uniform electric field, with a mfd i 7*otli8g1ujl+*qh*jx d 4agnitude of 500 V/m, is directed parallel to the +x axis. oiuqg* 8ld71ji+hx*ld fj*4tIf the potential at x = 5.0 m is 2500 V, what is the potential at x = 2.0 m?

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42#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider a uniform electric field of ez rzh2npl ))7ie2 kbhis5h*950 N/C directed toward the east. If the voltage measured relative to ground at a given point is 80 V, what is the voltage at a pointlrh 5 pkei he79z)b2i2zn*s)h 1.0 m directly west of that point?

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43#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A proton moves 0.10 m alonk wihcjjh+*0* g the direction of an electric field of magnitude 3.0 V/m. What is the change in kinetic e*h c+hij0*wjknergy of the proton?

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44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel plates, separa-u ap(u r4q+9)utr fskted by 0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a distance 1.50 m from the positive plate, what is the potential difference between the in)r 4f (suuu9p -t+arkqitial and final points?

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45#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel plates, separatedy2 gix1 .n8*zkjb3 ewl by 0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a distance 0.050 m from the positive plate, how much kinetic enjz1l382wbxni geky *.ergy does the electron gain?

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46#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel plates, separated by 0.2p) (aa tpspq.4xnwyqph 3 7)(q0 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a distance 0.050 m from the positive plate, what is th p) tx wq4na7p.qhyp3(q()ps ae speed of the electron?

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47#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider a uniform electric field of 50 N/C -vagn zvkp*/3f/nlq w03.vaidirected toward the east. If the voltage measured relative to ground at a given point in the field is 80 V, what is the voltage at a poin*vik nvqf/ av3gwn3al. /z0-pt 1.0 m directly east of the point?

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48#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider a uniform electric field of 50 N/C directed toward the east. If the /k5xj b7f/de r)(oxfevoltage measured relative to ground at a given point in ff5rdk ()xj e7o/ex/bthe field is 80 V, what is the voltage at a point 1.0 m directly south of that point?

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49#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If a Cu2+ ion drops th( jk daxjb72;l(;bml s 77xnwkrough a potential difference of 12 V, it will acquire a kinetic energy (in the absencl;bmwx7ab l( ks(2dk7 n;7 xjje of friction) of

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50#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the potential at a distany42qc+ie8 r;cj;li fhce of $5.0 \times 10^{-10} \; m$ from a nucleus of charge +50e?

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51#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two 3.00-mC charges are at the ends of a meter stick. Find the electrical potei)vrl 1 9a:-iegz zl.f4du*zu ntial for the center of the meter sti1*r)4zzd:lgfuluvi9-. ai z eck.

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52#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 5.0-nC charge is at (0, 0) and a (bs1wal*a6g dnz e28z,t 4rko-2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electrz( 2a,ekrbw 1od zgsl* 6n8a4tic potential at point (0, 4.0 m)?

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53#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 5.0-nC charge is at (0, 0) and a -2.0-nC charge is at (3wqwsvo5) 3,k9 i 8dehq.0 m, 0). If the potential is tahww5)3e8iksvo9q q d ,ken to be zero at infinity, what is the electric potential energy of a 1.0-nC charge at point (0, 4.0 m)?

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54#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 5.0-nC charge is at (0, 0) and a -2.0-nC charge i xvlygm0qk96. 5e0pzy 45lpsbs at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work required to bring a 1.0-nC charge from infinity to point (0,qxs4lz.y y69055lg vmebk pp0 4.0 m)?

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55#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Four charges of equal charge +q are placed at the corners of a rrw z4/oo7xh, 0cl.tkxb g/e )zectangle of sides a and b. What is the potential at the center of the rectangle if q = 2.0 mC, a = 3.0 cm, and b = 4.0 c,h.x/o )x4 lg b0zz7e/rok wtcm?

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56#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A square is 1.0 m on a side. Charges of +4.0 mC are placed in tb *i b1 r.kne1hhii;x mg45 x3);zfdicwo diagonally opposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What isi114) rikb. 3gb;h f xecnxizd;*him 5 the absolute potential in the square's center?

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57#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An alpha particle (cfzl ojdo2 (0-iharge +2e, mass $6.64 \times 10^{-27} \; kg$) moves head-on at a fixed gold nucleus (charge +79e). If the distance of closest approach is $2.0 \times 10^{-10} \; m$, what was the initial speed of the alpha particle?

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58#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much energy is necessary to place three charges, each of 2.0 mC, at the coul)gt*6m p5tw rnerp6twu gtm*l5 )s of an equilateral triangle of side 2.0 cm?

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59#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What charge appears on the plates of a 2.0-mF cap acui/g8 bo;w/2p;ex9c0stnn acitor when it is charged to 100 iopxcnbs /ew/a0g2;t8n9c u; V?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor has+xtltmuil.29 r* ieo 2) y7 lpetf xt5(mgi4v2 plates of area $0.50 \; m^{2}$ separated by a distance of 2.0 mm. What is this capacitor's capacitance?

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61#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitnhnn:-.(u(: lcb 5kgaiibw9 qor is filled with air, and the plates are separated by 0.050 mm. If the capacitance is 17.3 pF-uhni niqncb(59.:ab:wgkl( , what is the plate area?

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62#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor has q7vvu3-t dx6gk*7iroplates of area $0.20 \; m^{2}$ separated by a distance of 1.0 mm. What is the strength of the electric field between these plates when this capacitor is connected to a 6.0-V battery?

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63#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor has a plate separa s9 rwz ji(0c*evcn43ntion of 5.0 cm. If the potential difference between the plates is 2000 V, with the top plate at the higsncj ewn *0ir4(39 czvher potential, what is the electric field between the plates?

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64#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 6.0-mF air capacitor is connectede72 arf7va gt* across a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge flows from the battery, which remainedav et7*a7r2fg connected during the process?

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65#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A charge of 60 mC is placed on a 15 mF capacito1+e1zr xa ynk8r. How much energy is stored in txn+1ya rzk1e8 he capacitor?

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66#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  20 V is placed across a 15 mF capacitor. What is the energy stored in the capy gup( * l9s94iemuj.race4*mi9yl(g uju.9 srpitor?

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67#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A charge of 2.00 mC flows ony1*:uj3z rkzfto the plates of a capacitor when it is connected to a 12.0f:z3jkury1 * z-V battery. How much work was done in charging this capacitor?

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68#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If a 10-mF capacitor is chavj ; zmon:z+k7rged so that it stores $2.0 \times 10^{-3} \; J$ of energy, what is the voltage across it?

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69#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor consists of plates of a/t w3zt4k6.ooczlqj )rea $1.5 \times 10^{-4} \; m^{2}$ and separated by 1.0 mm. The capacitor is connected to a 12-V battery. What is the capacitance?

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70#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor consists of plates of ar 9luqo.*;hbtv-sy -tx ea $1.5 \times 10^{-4} \; m^{2}$ and separated by 1.0 mm. The capacitor is connected to a 12-V battery. What is the charge on the plates?

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71#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor consists oo9w)1 -vnmk0y3uv cr cf plates of area $1.5 \times 10^{-4} \; m^{2}$ and separated by 1.0 mm. The capacitor is connected to a 12-V battery. What is the electric field between the plates?

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72#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor is constructed with plate area of txgo+agu. 8;i:usk ;w$0.40 \; m^{2}$ and a plate separation of 0.10 mm. How much charge is stored on it when it is charged to a potential difference of 12 V?

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73#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor is constructed with platp3npw 7i4i2l o hoh/-qe area of $0.40 \; m^{2}$ and a plate separation of 0.10 mm. How much energy is stored when it is charged to a potential difference of 12 V?

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74#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 15-mF capacitor is connected to a qd jy; o(l.. fah:/0 dfngt;mz50-V battery and becomes fully charged. The battery isd0j;ytfz/g( faold;. q nh:m. removed and a slab of dielectric that completely fills the space between the plates is inserted. If the dielectric has a dielectric constant of 5.0, what is the capacitance of the capacitor after the slab is inserted?

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75#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 15-mF capacitor is connect e8a8 2z 4).jlrhyyccc,bu5;:vjpkmzed to a 50-V battery and becomes fully charged. The battery is removed and a slazjl mhc2ek jrcu.85c,: z8y4y a)v;bpb of dielectric that completely fills the space between the plates is inserted. If the dielectric has a dielectric constant of 5.0, what is the voltage across the capacitor's plates after the slab is inserted?

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